static FVector FindHeightFieldOpposingNormal(const PxLocationHit& PHit, const FVector& TraceDirectionDenorm, const FVector InNormal)
{
if (IsInvalidFaceIndex(PHit.faceIndex))
{
return InNormal;
}
PxHeightFieldGeometry PHeightFieldGeom;
const bool bReadGeomSuccess = PHit.shape->getHeightFieldGeometry(PHeightFieldGeom);
check(bReadGeomSuccess); //we should only call this function when we have a heightfield
if (PHeightFieldGeom.heightField)
{
const PxU32 TriIndex = PHit.faceIndex;
const PxTransform PShapeWorldPose = PxShapeExt::getGlobalPose(*PHit.shape, *PHit.actor);
PxTriangle Tri;
PxMeshQuery::getTriangle(PHeightFieldGeom, PShapeWorldPose, TriIndex, Tri);
PxVec3 TriNormal;
Tri.normal(TriNormal);
return P2UVector(TriNormal);
}
return InNormal;
}
static bool FindHeightFieldOpposingNormal(const PxLocationHit& PHit, const FVector& TraceDirectionDenorm, FVector& OutNormal)
{
PxHeightFieldGeometry PHeightFieldGeom;
bool bSuccess = PHit.shape->getHeightFieldGeometry(PHeightFieldGeom);
check(bSuccess); //we should only call this function when we have a heightfield
if (PHeightFieldGeom.heightField)
{
const PxU32 TriIndex = PHit.faceIndex;
const PxTransform PShapeWorldPose = PxShapeExt::getGlobalPose(*PHit.shape, *PHit.actor);
PxTriangle Tri;
PxMeshQuery::getTriangle(PHeightFieldGeom, PShapeWorldPose, TriIndex, Tri);
PxVec3 TriNormal;
Tri.normal(TriNormal);
OutNormal = P2UVector(TriNormal);
return true;
}
return false;
}
static PxU32 createInvisibleWalls(const CCTParams& params, const PxTriangle& currentTriangle, TriArray& worldTriangles, IntArray& triIndicesArray)
{
const PxF32 wallHeight = params.mInvisibleWallHeight;
if(wallHeight==0.0f)
return 0;
PxU32 nbNewTris = 0; // Number of newly created tris
const PxVec3& upDirection = params.mUpDirection;
PxVec3 normal;
currentTriangle.normal(normal);
if(testSlope(normal, upDirection, params.mSlopeLimit))
{
const PxVec3 upWall = upDirection*wallHeight;
PxVec3 v0p = currentTriangle.verts[0] + upWall;
PxVec3 v1p = currentTriangle.verts[1] + upWall;
PxVec3 v2p = currentTriangle.verts[2] + upWall;
// Extrude edge 0-1
PxVec3 faceNormal01;
{
// 0-1-0p
const PxTriangle tri0_1_0p(currentTriangle.verts[0], currentTriangle.verts[1], v0p);
worldTriangles.pushBack(tri0_1_0p);
// 0p-1-1p
const PxTriangle tri0p_1_1p(v0p, currentTriangle.verts[1], v1p);
worldTriangles.pushBack(tri0p_1_1p);
tri0p_1_1p.normal(faceNormal01);
}
// Extrude edge 1-2
PxVec3 faceNormal12;
{
// 1p-1-2p
const PxTriangle tri1p_1_2p(v1p, currentTriangle.verts[1], v2p);
worldTriangles.pushBack(tri1p_1_2p);
// 2p-1-2
const PxTriangle tri2p_1_2(v2p, currentTriangle.verts[1], currentTriangle.verts[2]);
worldTriangles.pushBack(tri2p_1_2);
tri2p_1_2.normal(faceNormal12);
}
// Extrude edge 2-0
PxVec3 faceNormal20;
{
// 0p-2-0
const PxTriangle tri0p_2_0(v0p, currentTriangle.verts[2], currentTriangle.verts[0]);
worldTriangles.pushBack(tri0p_2_0);
// 0p-2p-2
const PxTriangle tri0p_2p_2(v0p, v2p, currentTriangle.verts[2]);
worldTriangles.pushBack(tri0p_2p_2);
tri0p_2p_2.normal(faceNormal20);
}
const PxU32 triIndex = PX_INVALID_U32;
for(PxU32 i=0;i<6;i++)
triIndicesArray.pushBack(triIndex);
nbNewTris += 6;
}
return nbNewTris;
}
